Improvement in machines for hulling coffee



e. ANDERSON.

Coffee Hullen No. 55,942 Patented June V26; l1866.A

Wvn asses ROBERT ANDERSON, OF BROOKLYN,

PATENT OEEicE.

ASSIGNOR TO S. O. RIDER, OF NEW YORK, N. Y.

IMPROVEMENT IN MACHINES FOR HULLING COFFEE.

Specification forming part of Letters Patent No. 55,947, dated June 26, 1866.

To all whom it may concern:

Be it known that I, ROBERT ANDERSON, of Brooklyn, in the county of Kings and State of New York, have invented a new'and useful Improvement in Machines for Hulling and Polishing Coffee and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this speciiication, in which- Figure 1 is a plan view of the invention in an open condition. Fig. 2 is a vertical longitudinal section of the same in a closed condition.

Similar letters of reference indicate corresponding parts in both gures. This invention consists in a novel construction of a machine for removing the hulls and skins from coffee-berries, whereby the requiredV hullin g and polishing operations are performed in a very rapid and efficient manner.

To enable others to understand the construction aiid operation of my invention, I will proceed to describe it with reference to the drawings.

A represents a conical or tapering case formed of sheet metal or other suitable material and supported in a horizontal position by means of standards B. This case A is divided horizontally into two halves, which are hinged together at one side, as shown at c', so that they may be opened or swung apart, as represented in Fig. l. Secured upon the smaller end of the case A is an annular grinder or con cave, O, ofcast-iron or other material, which is also somewhat conical in form, and which has its inner surface studded with any desired number of short nodules or teeth, c, asshown more clearly in Fig. l. Formed in the upper side of this concave O is an opening, b, to the upper end of which is fitted a hopper, c.

D is a longitudinal central shaft, one end of which works in a bearing formed in the large end e of the case A, while the opposite end thereof works in a similar bearing in the end` fof the concave C. Placed in the said concave and fixed upon the end of the shaft D is a slightly conical circular block or wheel, E, which has oblique ribs g formed transversely upon its circ u in ference, as sho Wn more clearly in Fig.1. The distance between the inner sides of the concave and the circumference of the wheel E is sufficient to allow the coffee-kernels to pass between them, at the same time that they are close enough to tear or break the hulls away from the said kernels, as will be hereinafter fully set forth.

Fixed upon the main length ofthe shaft D, within the case A, is a long tapering hub or block, F, in which are secured radial vanes or wings G, the outer edges of which are nearly or quite in contact with the sides or inner circumference of the case A, and are made of rawhide or other suitable material.

The inner sides or circumference of the case A are coated with any appropriate cement in order to give it the roughness required in order to remove the skins from the coffee-berries and to polish the said berries. Formed in the lower side of the largest end of the case A is an opening, fi, at the lower side of which is tted an outwardly-proj ectin g spout, j. Fixed upon the outer end ofthe shaft D s a crank, la, by means of which the said shaft is rotated, and also secured upon the same end of the said shaft is a pulley or band-wheel, m.

H represents a fan-blower, which is operated by a belt, n, passing from the pulley m to a smaller pulley, r, on the shaft of the fan. The air-pipe s of this fan-blower is curved and situated in such relation with the spout j as to blow the hulls and refuse from the polished coffee-kernels as they pass from the machine, as will be presently further explained.

The case A being closed and a rotary motion communicated to the shaft D, the iinhulled coffee-berries are placed in the hopper c and pass down through the opening b into the space between the wheel E and the concave O, whereupon the tearing and abrading action of the ribs g and teeth or nodules a tear and strip the hulls from the kernels, the mingled hulls and kernels being forced gradually inward into the case A by the obliqrue edges of the ribs g.

Having thus entered the case A, the kernels are` acted upon by the rotating vanes G, which triturate them in contact with the rough inner surface of the case A until the skins which envelop the kernels are entirely removed and the said kernels polished by the friction upon them, which being done, the kernels, together with the hulls, pass out through the opening i into the spoutj, whereupon the blast of air from the fan-blower blows the hulls and refuse out and over one side of the spout 7', While the clean and polished kernels pass oft from the end thereof. The proper passage of the coffee and hulls from the small to the large end of the ease A, or, in other Words, from the hulling-mill C E to the opening fi, is secured by the inclined position of the lower side of the said ease A.

What I claim as new, and. desire to secure by Letters Patent, is-

ROBERT ANDERSON.

Witnesses SAMUEL S. ANDERsoN, CLINTON WILsoN. 

